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Integrated thermochemical conversion process for valorizing mixed agricultural and dairy waste to nutrient-enriched biochars and biofuels
- Source :
- Bioresource Technology. 328:124765
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Hydrothermal carbonization (HTC) and pyrolysis are two promising thermochemical conversion strategies to valorize agricultural wastes, yet neither process can be implemented alone to sustainably upgrade both wet and dry feedstocks. HTC is ideal for wet feedstocks, such as manure, but its solid hydrochars suffer from low surface area and stability. Pyrolysis is well suited to dry agricultural residues, but pyrolysis biochars have low nutrient contents and bio-oils are often highly oxygenated. We propose an integrated process that co-pyrolyzes a nutrient-rich cow manure hydrochar with raw agricultural residues, which effectively reduces the environmental impact of these wastes while producing value-added bioproducts. Biochars produced from the proposed process are more suitable for soil amendments due to their enhancement in bioavailable nutrients and surface area than the manure hydrochars and raw biomass. Co-pyrolysis of blends enriched with cow manure yield oils higher in alkanes and alkenes with fewer oxygenated compounds.
- Subjects :
- 0106 biological sciences
Environmental Engineering
Biomass
Bioengineering
010501 environmental sciences
01 natural sciences
Soil
Hydrothermal carbonization
010608 biotechnology
Bioproducts
Biochar
Animals
Waste Management and Disposal
0105 earth and related environmental sciences
Renewable Energy, Sustainability and the Environment
Temperature
Nutrients
General Medicine
Pulp and paper industry
Manure
Biofuel
Biofuels
Charcoal
Environmental science
Cattle
Female
Pyrolysis
Cow dung
Subjects
Details
- ISSN :
- 09608524
- Volume :
- 328
- Database :
- OpenAIRE
- Journal :
- Bioresource Technology
- Accession number :
- edsair.doi.dedup.....3fac7dfd8b286b3ef0cfd3fb480632fe